summaryrefslogtreecommitdiff
path: root/nis/nss_nisplus/nisplus-hosts.c
diff options
context:
space:
mode:
Diffstat (limited to 'nis/nss_nisplus/nisplus-hosts.c')
-rw-r--r--nis/nss_nisplus/nisplus-hosts.c412
1 files changed, 412 insertions, 0 deletions
diff --git a/nis/nss_nisplus/nisplus-hosts.c b/nis/nss_nisplus/nisplus-hosts.c
new file mode 100644
index 0000000000..0a486411de
--- /dev/null
+++ b/nis/nss_nisplus/nisplus-hosts.c
@@ -0,0 +1,412 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <nss.h>
+#include <netdb.h>
+#include <errno.h>
+#include <ctype.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <libc-lock.h>
+#include <rpcsvc/nis.h>
+#include <rpcsvc/nislib.h>
+
+#include "nss-nisplus.h"
+
+__libc_lock_define_initialized (static, lock)
+
+static nis_result *result = NULL;
+static nis_name *names = NULL;
+
+#define NISENTRYVAL(idx,col,res) \
+ ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val)
+
+#define NISENTRYLEN(idx,col,res) \
+ ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len)
+
+/* Get implementation for some internal functions. */
+#include "../../resolv/mapv4v6addr.h"
+#include "../../resolv/mapv4v6hostent.h"
+
+#define ENTNAME hostent
+#define DATABASE "hosts"
+#define NEED_H_ERRNO
+
+#define ENTDATA hostent_data
+struct hostent_data
+ {
+ unsigned char host_addr[16]; /* IPv4 or IPv6 address. */
+ char *h_addr_ptrs[2]; /* Points to that and null terminator. */
+ };
+
+#define TRAILING_LIST_MEMBER h_aliases
+#define TRAILING_LIST_SEPARATOR_P isspace
+#include "../../nss/nss_files/files-parse.c"
+LINE_PARSER
+("#",
+ {
+ char *addr;
+
+ STRING_FIELD (addr, isspace, 1);
+
+ /* Parse address. */
+ if ((_res.options & RES_USE_INET6)
+ && inet_pton (AF_INET6, addr, entdata->host_addr) > 0)
+ {
+ result->h_addrtype = AF_INET6;
+ result->h_length = IN6ADDRSZ;
+ }
+ else
+ if (inet_pton (AF_INET, addr, entdata->host_addr) > 0)
+ {
+ if (_res.options & RES_USE_INET6)
+ {
+ map_v4v6_address ((char *) entdata->host_addr,
+ (char *) entdata->host_addr);
+ result->h_addrtype = AF_INET6;
+ result->h_length = IN6ADDRSZ;
+ }
+ else
+ {
+ result->h_addrtype = AF_INET;
+ result->h_length = INADDRSZ;
+ }
+ }
+ else
+ /* Illegal address: ignore line. */
+ return 0;
+
+ /* Store a pointer to the address in the expected form. */
+ entdata->h_addr_ptrs[0] = entdata->host_addr;
+ entdata->h_addr_ptrs[1] = NULL;
+ result->h_addr_list = entdata->h_addr_ptrs;
+
+ /* If we need the host entry in IPv6 form change it now. */
+ if (_res.options & RES_USE_INET6)
+ {
+ char *bufptr = data->linebuffer;
+ size_t buflen = (char *) data + datalen - bufptr;
+ map_v4v6_hostent (result, &bufptr, &buflen);
+ }
+
+ STRING_FIELD (result->h_name, isspace, 1);
+ }
+)
+
+
+static int
+_nss_nisplus_parse_hostent (nis_result *result, struct hostent *host,
+ char *buffer, size_t buflen)
+{
+ char *p = buffer;
+ size_t room_left = buflen;
+ int parse_res, i;
+ struct parser_data *data = (void *) buffer;
+
+ if (result == NULL)
+ return -1;
+
+ if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) ||
+ result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ ||
+ strcmp(result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type,
+ "hosts_tbl") != 0 ||
+ result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len < 4)
+ return -1;
+
+ memset (p, '\0', room_left);
+
+ /* Generate the hosts entry format and use the normal parser */
+ if (NISENTRYLEN (0, 2, result) + 1 > room_left)
+ {
+ __set_errno (ERANGE);
+ return -1;
+ }
+ strncpy (p, NISENTRYVAL (0, 2, result),
+ NISENTRYLEN (0, 2, result));
+ room_left -= (NISENTRYLEN (0, 2, result) + 1);
+
+ if (NISENTRYLEN (0, 0, result) + 1 > room_left)
+ {
+ __set_errno (ERANGE);
+ return -1;
+ }
+ strcat (p, "\t");
+ strncat (p, NISENTRYVAL (0, 0, result), NISENTRYLEN (0, 0, result));
+ room_left -= (NISENTRYLEN (0, 0, result) + 1);
+ /* + 1: We overwrite the last \0 */
+
+ for (i = 1; i < result->objects.objects_len; i++)
+ {
+ if (NISENTRYLEN (i, 1, result) + 1 > room_left)
+ {
+ __set_errno (ERANGE);
+ return -1;
+ }
+ strcat (p, " ");
+ strcat (p, NISENTRYVAL (i, 1, result));
+ room_left -= (NISENTRYLEN (i, 1, result) + 1);
+ }
+
+ parse_res = parse_line (p, host, data, buflen);
+
+ return parse_res;
+}
+
+enum nss_status
+_nss_nisplus_sethostent (void)
+{
+ __libc_lock_lock (lock);
+
+ if (result)
+ nis_freeresult (result);
+ result = NULL;
+ if (names)
+ {
+ nis_freenames (names);
+ names = NULL;
+ }
+
+ __libc_lock_unlock (lock);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nisplus_endhostent (void)
+{
+ __libc_lock_lock (lock);
+
+ if (result)
+ nis_freeresult (result);
+ result = NULL;
+ if (names)
+ {
+ nis_freenames (names);
+ names = NULL;
+ }
+
+ __libc_lock_unlock (lock);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+static enum nss_status
+internal_nisplus_gethostent_r (struct hostent *host, char *buffer,
+ size_t buflen, int *herrnop)
+{
+ int parse_res;
+
+ /* Get the next entry until we found a correct one. */
+ do
+ {
+ if (result == NULL)
+ {
+ names = nis_getnames("hosts.org_dir");
+ if (names == NULL || names[0] == NULL)
+ return NSS_STATUS_UNAVAIL;
+
+ result = nis_first_entry(names[0]);
+ if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
+ {
+ int retval;
+
+ retval = niserr2nss (result->status);
+ if (retval == NSS_STATUS_TRYAGAIN)
+ {
+ *herrnop = NETDB_INTERNAL;
+ __set_errno (EAGAIN);
+ }
+ return retval;
+ }
+
+ }
+ else
+ {
+ nis_result *res2;
+
+ res2 = nis_next_entry(names[0], &result->cookie);
+ nis_freeresult (result);
+ result = res2;
+ if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
+ {
+ int retval;
+
+ retval = niserr2nss (result->status);
+ if (retval == NSS_STATUS_TRYAGAIN)
+ {
+ *herrnop = NETDB_INTERNAL;
+ __set_errno (EAGAIN);
+ }
+ return retval;
+ }
+ }
+
+ parse_res = _nss_nisplus_parse_hostent (result, host, buffer, buflen);
+ if (!parse_res && errno == ERANGE)
+ {
+ *herrnop = NETDB_INTERNAL;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ } while (!parse_res);
+
+ return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nisplus_gethostent_r (struct hostent *result, char *buffer,
+ size_t buflen, int *herrnop)
+{
+ int status;
+
+ __libc_lock_lock (lock);
+
+ status = internal_nisplus_gethostent_r (result, buffer, buflen, herrnop);
+
+ __libc_lock_unlock (lock);
+
+ return status;
+}
+
+enum nss_status
+_nss_nisplus_gethostbyname2_r (const char *name, int af, struct hostent *host,
+ char *buffer, size_t buflen, int *herrnop)
+{
+ int parse_res, retval;
+
+ if (name == NULL)
+ {
+ __set_errno (EINVAL);
+ *herrnop = NETDB_INTERNAL;
+ return NSS_STATUS_NOTFOUND;
+ }
+ else
+ {
+ nis_result *result;
+ char buf[strlen (name) + 255];
+
+ /* Search at first in the alias list, and use the correct name
+ for the next search */
+ sprintf(buf, "[name=%s],hosts.org_dir", name);
+ result = nis_list(buf, EXPAND_NAME, NULL, NULL);
+
+ /* If we do not find it, try it as original name. But if the
+ database is correct, we should find it in the first case, too */
+ if ((result->status != NIS_SUCCESS &&
+ result->status != NIS_S_SUCCESS) ||
+ result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ ||
+ strcmp(result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type,
+ "hosts_tbl") != 0 ||
+ result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len
+ < 3)
+ sprintf(buf, "[cname=%s],hosts.org_dir", name);
+ else
+ sprintf(buf, "[cname=%s],hosts.org_dir", NISENTRYVAL(0, 0, result));
+
+ nis_freeresult (result);
+ result = nis_list(buf, EXPAND_NAME, NULL, NULL);
+
+ retval = niserr2nss (result->status);
+ if (retval != NSS_STATUS_SUCCESS)
+ {
+ if (retval == NSS_STATUS_TRYAGAIN)
+ {
+ __set_errno (EAGAIN);
+ *herrnop = NETDB_INTERNAL;
+ }
+ nis_freeresult (result);
+ return retval;
+ }
+
+ parse_res = _nss_nisplus_parse_hostent (result, host, buffer, buflen);
+
+ nis_freeresult (result);
+
+ if (parse_res)
+ return NSS_STATUS_SUCCESS;
+
+ *herrnop = NETDB_INTERNAL;
+ if (!parse_res && errno == ERANGE)
+ return NSS_STATUS_TRYAGAIN;
+ else
+ return NSS_STATUS_NOTFOUND;
+ }
+}
+
+enum nss_status
+_nss_nisplus_gethostbyname_r (const char *name, struct hostent *host,
+ char *buffer, size_t buflen, int *h_errnop)
+{
+ if (_res.options & RES_USE_INET6)
+ {
+ enum nss_status status;
+
+ status = _nss_nisplus_gethostbyname2_r (name, AF_INET6, host, buffer,
+ buflen, h_errnop);
+ if (status == NSS_STATUS_SUCCESS)
+ return status;
+ }
+
+ return _nss_nisplus_gethostbyname2_r (name, AF_INET, host, buffer,
+ buflen, h_errnop);
+}
+
+enum nss_status
+_nss_nisplus_gethostbyaddr_r (const char *addr, struct hostent *host,
+ char *buffer, size_t buflen, int *herrnop)
+{
+ if (addr == NULL)
+ return NSS_STATUS_NOTFOUND;
+ else
+ {
+ nis_result *result;
+ char buf[24 + strlen (addr)];
+ int retval, parse_res;
+
+ sprintf(buf, "[addr=%s],hosts.org_dir", addr);
+
+ result = nis_list(buf, EXPAND_NAME, NULL, NULL);
+
+ retval = niserr2nss (result->status);
+ if (retval != NSS_STATUS_SUCCESS)
+ {
+ if (retval == NSS_STATUS_TRYAGAIN)
+ {
+ __set_errno (EAGAIN);
+ *herrnop = NETDB_INTERNAL;
+ }
+ nis_freeresult (result);
+ return retval;
+ }
+
+ parse_res = _nss_nisplus_parse_hostent (result, host, buffer, buflen);
+
+ nis_freeresult (result);
+
+ if (parse_res)
+ return NSS_STATUS_SUCCESS;
+
+ *herrnop = NETDB_INTERNAL;
+ if (!parse_res && errno == ERANGE)
+ return NSS_STATUS_TRYAGAIN;
+ else
+ return NSS_STATUS_NOTFOUND;
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-27 13:28:20 +0000